Pour the white glue into a large bowl. Then add the water and baking soda. Stir with a spoon until combined.
Squeeze in some acrylic paint, then stir. Add more acrylic paint if needed until you're happy with the colour. Remember that the colour will lighten up quite a bit after you add the shaving cream.
Add about 3 cups of foaming shaving cream to the mixture, then stir gently until the mixture has a consistent colour throughout.
Add the contact lens solution and stir until the slime stops sticking to the side of the bowl. If it gets too difficult to stir, feel free to knead it with your hands.
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Notes
If the slime is too sticky, add more contact lens solution.The fluffiness will only last for a day. After that, it will be regular slime, that you can store in an airtight container for about a week.